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x86_32: apic/summit_32, fix cpu_mask_to_apicid

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Perform same-cluster checking even for masks with all (nr_cpu_ids)
bits set and report correct apicid on success instead.

While at it, convert it to for_each_cpu and newer cpumask api.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jiri Slaby 2009-03-02 10:53:58 +01:00 committed by Ingo Molnar
parent 0edc0b324a
commit fae176d6e0
1 changed files with 9 additions and 21 deletions
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30
arch/x86/kernel/apic/summit_32.c
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@ -291,33 +291,21 @@ static int summit_check_phys_apicid_present(int boot_cpu_physical_apicid)
static unsigned int summit_cpu_mask_to_apicid(const cpumask_t *cpumask)
{
int cpus_found = 0;
int num_bits_set;
int apicid;
int cpu;
unsigned int round = 0;
int cpu, apicid = 0;
num_bits_set = cpus_weight(*cpumask);
if (num_bits_set >= nr_cpu_ids)
return BAD_APICID;
/*
* The cpus in the mask must all be on the apic cluster.
*/
cpu = first_cpu(*cpumask);
apicid = summit_cpu_to_logical_apicid(cpu);
for_each_cpu(cpu, cpumask) {
int new_apicid = summit_cpu_to_logical_apicid(cpu);
while (cpus_found < num_bits_set) {
if (cpu_isset(cpu, *cpumask)) {
int new_apicid = summit_cpu_to_logical_apicid(cpu);
if (APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
printk("%s: Not a valid mask!\n", __func__);
return BAD_APICID;
}
apicid = apicid | new_apicid;
cpus_found++;
if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
printk("%s: Not a valid mask!\n", __func__);
return BAD_APICID;
}
cpu++;
apicid |= new_apicid;
round++;
}
return apicid;
}